Flexible jelly-roll type secondary battery

Active Publication Date: 2014-06-26
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent is about a new type of battery that is flexible and can change shape without losing power. This is made possible by using a special technique that keeps the battery's components in place, even if it is bent or rolled up. This makes the battery stronger and more durable.

Problems solved by technology

However, when portions coated with an active material are curved, problems in which the portions are irreversibly transformed and short circuits in electrodes occur due to the separation of an electrode active material from current collector surfaces may occur such that stability of batteries may be deteriorated.

Method used

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  • Flexible jelly-roll type secondary battery
  • Flexible jelly-roll type secondary battery
  • Flexible jelly-roll type secondary battery

Examples

Experimental program
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Embodiment Construction

[0032]Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

[0033]Embodiments may, however, be embodied in many different forms and should not be construed as being limited to embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. In the drawings, the shapes and dimensions of elements may be exaggerated for clarity.

[0034]A reversibly flexible jelly-roll type secondary battery according to an embodiment may be provided. In general, a jelly-roll type secondary battery may be formed by stacking a cathode and an anode on one another with a separation film interposed therebetween, to be rolled to have a jelly roll form. The cathode and the anode may include an uncoated portion 11 not coated with an active material. The battery may be flexible in the uncoated portion 11 such that a jelly-roll t...

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PUM

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Abstract

There is provided a jelly-roll type electrode assembly. In the jelly-roll type electrode assembly including a cathode including a cathode active material coating layer and an anode including an anode active material coating layer, with a separation film interposed therebetween, and formed to be rolled, the jelly-roll type electrode assembly is characterized in that the anode and the cathode include uncoated portions, the uncoated portions are overlapped and include mirror images formed on a front surface and a rear surface, and the jelly-roll type electrode assembly is flexible in the uncoated portion. A pouch-type secondary battery, a battery pack and a device including the electrode assembly are provided. A flexible jelly-roll type secondary battery may be reversibly flexible while blocking the separation of an electrode active material from a current collector surface.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the priority of Korean Patent Application Nos. 10-2012-0126317 filed on Nov. 8, 2012 and 10-2013-0134438 filed on Nov. 6, 2013, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]Aspects of embodiments relate to a flexible jelly-roll type secondary battery.[0004]2. Description of the Related Art[0005]Unlike non-rechargeable primary batteries, secondary batteries are chargeable and dischargeable batteries. The range of use thereof is very wide, from small sized portable electronic devices to large scale electrical and electronic apparatuses such as hybrid vehicles or the like.[0006]Secondary batteries are configured by allowing electrode assemblies, having separation films as insulators provided therein and interposed between anodes and cathodes, to be embedded in cases, and installing cap assemblies ...

Claims

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Application Information

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IPC IPC(8): H01M10/04H01M50/105
CPCH01M10/0431H01M10/0587H01M4/0404H01M2004/021H01M2004/025H01M50/105H01M4/13Y02E60/10Y02P70/50H01M2220/20H01M50/463H01M50/538H01M50/20H01M2220/30H01M2220/10
InventorCHUNG, JOO-YOUNGJUNG, HYUN-CHULCHUNG, JAE-BINAN, IN-GU
OwnerLG ENERGY SOLUTION LTD